Exam (elaborations)
COS Oct Nov Discussion
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- University Of South Africa
COS Oct Nov Discussion
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lOMoARcPSD|14447089COS3711 2021 OCT NOV DISCUSSION
COS3711 2021 Oct Nov Discussion
Advanced Programming (University of South Africa)
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All businesses need to manage their communication, and the simplified scenario used in this
examination is based on communication strategies. The idea is that a user can select a type of
communication channel and have a message sent out on that channel at some specific point
in time. The application itself allows the user to set up the required options and just the strategy
and message will be displayed for the purposes of a brief history of messages sent – See Figure
1.
Figure 1. App window.
Question 1
Apply the strategy design pattern to the scenario above that would also adhere to the following
requirements.
1. There are currently 3 basic strategies/channels for communication: Signal, SMS, and
WhatsApp. Your design should include a strategy for each channel.
2. All that is needed to create one of these is a type name.
3. Once an appropriate type has been created, a setUp() function would be used to populate
object instance data members, and the communicate() function used to process the
required communication.
A CommunicationStrategy UML class diagram has already been drawn up – see Figure 2.
Note that you may abbreviate this class name to ComStrat in your answers.
Figure 2. UML class diagram
1.1 Considering the scenario given and design decisions listed above, draw a UML class
diagram for the strategy pattern. You should include the necessary classes, class
attributes, class constructors and operations, and class relationships to make it clear you
understand how data will be managed and passed between classes. Label all
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